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Re: [RFC PATCH 5/5] gitlab-ci.d/crossbuilds.yml: Enable compilation with

From: Philippe Mathieu-Daudé
Subject: Re: [RFC PATCH 5/5] gitlab-ci.d/crossbuilds.yml: Enable compilation with ccache
Date: Wed, 14 Apr 2021 12:29:53 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1

On 4/14/21 10:19 AM, Thomas Huth wrote:
> Ccache can speed up the compilation in some cases, so enable it for
> our cross-compilation CI builds, too.
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  .gitlab-ci.d/crossbuilds.yml | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> diff --git a/.gitlab-ci.d/crossbuilds.yml b/.gitlab-ci.d/crossbuilds.yml
> index 017731a894..dee327a936 100644
> --- a/.gitlab-ci.d/crossbuilds.yml
> +++ b/.gitlab-ci.d/crossbuilds.yml
> @@ -1,4 +1,26 @@
> +
> +.ccache_cross_setup:
> +  cache:
> +    key: "$CI_JOB_NAME"
> +    paths:
> +      - ccache

I discovered last month the cache/artifact passing feature is useful
when all runners are in the same premises, but when you used runner
in different locations it become slower (except if all your runners
are in very fast clouds probably).

Not a short term problem, but can hit us long term. I haven't looked
if GitLab already figured how to manage this globally, like registering
runners with affinity, or assigning them to pools.

If we decide to stick with the free-tier runners, then this is a great

For custom runners, a simple kludge is to assert they do *not* use
cache/artifacts (from free-tier runners).

We could restrict this to free-tier runners but these runners tag aren't
standardized, and AFAIK we can not (yet?) use the "ANY" word to "select
runners with any of this tag list". So far I noticed gitlab uses these:
- shared docker
- gce docker
- gitlab-org
- gitlab-org-docker

The last 2 are recent, and seem to help with the problem I reported
that some runners don't have Docker installed:



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